MS4 won't allow 0 staff lines

I often will create a separate Acoustic Guitar part just for chord symbols. In MS3, I could set the number of staff lines to 0. MS4 won't let me go lower than 1. I know I can check "Invisible Staff Lines" for printing, but it makes editing visually difficult, as I need to see invisible objects for other aspects of editing.
See the attached image of a file that had the CAPO III line created in MS3 and the CAPO V line created in MS4.